Mixing attachment



Sept. 1 6, 1952 A. 1. PODELL 2,610,513

MIXING ATTACHMENT Filed July 22, 1947 3 Sheets-Sheet 1 145E142! J. PODHL /N 1/5 N TOR m/im ATTORNEY p 1952 A. I. PODELL 2,610,513

MIXING ATTACHMENT; Filed July 22, 1947 s sh eets sheet 2 By $141M Spt. 165 1952 PQDELL 2,610,513

MIXING ATTACHMENT A Filed July 22, 1947 3 Sheets-Sheet 3 2'0 J" f' '7.5. 20a 4 E ABMM f. P002213 //Vl EN7'0R ATTORNEY of electricity. In the bottom of the tank there was submerged a bag of salt (sodium chloride). As the mixing proceeds the salt enters into solution with the water, thereby permitting an increased flow of electricity in the circuit with the measuring instruments. Tests were made at different speeds and it was found that substantially 150 R. P. M. of the propeller or mixing element gave the best mixing speed. 7 It was found thatit actually took longer to mix at a higher speed than at a lower speed because at the higher speed certain materials do not have suflicient time to flow into the propellers for mixing. With the slower speed of rotation the mixing element actually beats the material which flows into the spaces between the blades.

High speed mixing is not only usually unsatisfactory for the reasons just described, but there is also an increase in cost to the user because the horse-power required to drive the mixing element increases substantially in the. ratio ofthe cube of theincrease in speed. Thus, doubling the diameter of a propeller. increases its effective area four times. For example, assuming a five-inch propeller having an efiective area oftWenty-five square, inches, whenthe diameter is increased to ten inches, the effective area increases to one hundred square. inches. It would thus appear thatincreasing the effectivearea ofthe propeller would result in anjincrease of four times the amount of liquid mixed at the same speed of rotation of the propeller.., With an increase in the. diameter of the propell-erthe power requirement, however, is increased tothe ratio of Thus, for example; if the five-inch propeller mentioned above required a one-quarter horse power 2,610,513 7' vii If 4 of this disclosure and be pointed out in the appended claims.

In the drawings in which similar reference characters designate corresponding parts throughout the several views:

Figure 1 is an enlarged vertical sectional View, partly in elevation. as seen from the plane Il on Figure 3.

Figure 2 is a fragmentary enlarged vertical sectional view of an alternate form of chuck.

Figure 3 is a plan view of a first embodiment of the invention.

motor to rotate the same under a given load at I a given speed, it would require thirty-two times I the old H. P. or eight horse-power to drive the ten-inch propeller at the same speed. In accordance with the present construction the mixing'speed is where possible and where dictated by thenature of the ingredients being mixed maintainedat substantially 150 R. P. M. This enables the use of relatively large propellers or mixing elements with a relatively small motor. Better mixing is thus obtained at lower power cost.

"Another object herein lies in the provision of a device of the class described which by reason of-the the proper balancing and arrangement of the parts permits the same to be secured to tanks or vessels of relatively light construction without additionally reinforcing the edge thereof which supports the mixing attachment.

' The underslung and offset position of 'the motor removes it from the path of fumes from the mixture which might have a harmful effect. I Another object-of the present invention lies in the provision of simple means for the declutching of the transmission so that the power to the main drive shaft or propeller shaft may be disconnected. This permits the motor to continue operating. without breaking the electrical circuit thereto. Thus, the electrical switch for the motor may be substantially'removed from the location of, the device and brushless motors which are relatively lower in cost, may be used instead of explosion-proof motors.

These objects and other incidental ends and advantages will more fully appearin the progress Figure 4 is an end elevational view of the first embodiment of the invention.

Figure 5 is a fragmentary vertical sectional 'view, partly in elevation, of a second embodiment ber 23 is penetrated by a screwclamp 24 having an operating'handle 25 and an inner terminal 26 which is adapted to clamp against the inner wall of a vessel or container (not shown) the outer wall of said container being thus compressedagainst the surface 21 of the frame II. The lower endof the frame II' is provided with transversely arranged orifice penetrated by a pin '28 which serves to pivotally mount the movable frame I2. The pin 28, at each end thereof may be provided with .a washer Z9 andmeans for preventing disconnection such as a cotter pin 30.

The movable frame I2 includes a body 3|, gen erally vertically arranged, which is provided at the lower rear edge thereof with a mounting plate 32. The mounting plate 32 serves as a'base to which the mounting bracket 33 of the motor I3 may be connected as by means of a nut and bolt 34., The top wall v35 of the movable frame I2 above the body 2i is substantially coextensive in width with the guard element I5 (see Fig. 3) and is provided withfour tapped orifices 36'. Threadedly engaged with and projecting laterally from the upper portion of the movableframe I2 is a clampingqbolt 5i which projectsv through an elongated slot 52 in the stationary frame II and is provided with a wing nut 56. The forward portion 31 of-the movableframe I2 has an upstanding rim and serves as a base for securing the auxiliary frame element38. ,The base 31 is provided with 'a countersunk bore 40 for passage of the main shaft I1.

The prime mover I3 may bev in the form of .any suitableelectric motor being in proportional cor-. relation with the rest of the device. The motor I3 is secured on the mounting plate 33. The motor may have theusual shaft 53 and a pulley 54 secured thereto. v

The auxiliary frame member. 38 comprises a side wall 4|, a top wall 42 and a bottom wall 43. Mounted by means of a forced fit and located centrally in the top wall of the frame member 38 is a bearing 4-3. The forward portion of the top wall 42 has an indentation 45 and downwardly projecting from the rear portion of the to wa ar apa 0 .39. (o ly onebeine sSwIR iIf'Eig-d); ifl hez-bottomewallzoftheauxiliatv frame 383 118522. .bearine 4 1-;-axia ;1-y=:-a ined with the bearing 44, a boss in the form of a cylindrically 1raisedportionz48 "provided with :a bearing ;seat. 4.9 therein-and disposedwithinztheibottom walla-Hare ,the tapped orifices :50.

The:-mainshaft,- indicated.-.generally bytrefer- :ence character I 1, has longitudinally arranged keywaysg55 and hasitsupperend-S'I anditslower endSB'redu edindiameter. r a I gThe speed changing :andpower-transmission :means 14 includes ra1conica1- -driving;:member16;! havinezanfinteeral shaft IT-whic is iournalled in a :shaft-; e ;ne 6.8- fIhe bearing 68 has :an ear e ion '1 w th a subs a tially. horiz ntal :h rt e 1 The sha t 11. ha e l p ion llw fixed :there mra izsu table pulley 5h r v h drivin be :Gohtactin th durin ember 6 :i a lidea-ble colla or annu a ive member .8 hi h-is actuated, :by the fork membelrBS. 'Iheiork member ;86 engages an annular groove inmember 84 -and. 1s di ab to m upwardly Qrdownwardly'on the adjusting screw 81 -to colfrespondinglyshift the members. 7

. 31 113? d eleme in lude a? handle fills-a to wal 1 aheh erl dis osed with are pect :to .therm ih Q ,i1 h; ll@ elemehth recessed :pdr ih M: i the ronthart of t e t p w ll a f o w l d 9E0 u aridl ea e g n 5 .T iue deleme t. ssee redt the meta fram b any su tab e mean s shi-as Vfih Srlwsifljwhichengage the orifices -35. I

i The .declutchihe-meahs; ndic ted enelall xby reference eherect r ir hQmhr e -a hnu l dhead 4 s, f e e ermin tinve e hehtshait 1-3 secu ed-thereh of the powertransmissiona-means 12M is proceeded vvvitlnand -held in; place c by the pin .619; The ad- -i usting; screw .18.! v-may-gnow-v be turned. through .the gfOlk' member 8fi'-;until the :bottom. end rests in -therseatsdi-l. The auxiliary frame element 38 with its .--par.ts may-nowsbe secured to the mov- 7 .716 which is elastic is-put in -place and the guard element secured to the -movable base. Due -to the relative simplicity in; assembly of the guard element to thef movable frame, access to the movin parts for purposes ojf'lubrication and infie i j i a im e mat er hu e mi t ng Jena: tnQuh re9ner 1ph- I e set screw '9 "may .nowlhe insert an the oc ing collar is and adjustin wheel .95 se u ed i place. 'flh ucl; is screwellto"themain shaft .11 with-the of the first embodiment gram-1219.1 The device is clamped '"to a -s 1'1ita;ble mixing vessel'containing the materials to be mixed: The 'motordrive' shafti53 rotates in a couhterclock wis vdirection when-viewed-from above. ;;By inieans of theirpulleys 5;4 andIQ-anddrivingebelt --1,,'the onica1 driving mem flfl rotate it 't f D.Q YWIn d v herrthe main; sh t t" in a clockwise direction. "This'p lockwise direction of ,themain shaft retards loosening *of 'thech-uck -16; insuring non-slipping of ithe-mi ging element. ,rnevclh h h o th dis n a em n Q t e .qoh eai .isirivihe mem e 67 'frbm-the me er; 84 i ascoim i h d hytu he h ad ustin mea -with cl ckw s d recti n .u th r i a :e earance 'hetwee ith chili li r he membe ah the; s ingm'ember. TThispermits haltingthe g withqu Qp h nerthe e e i a r uit t the m r. the eby even n s rk's: .Beehl' t qh Q ,Lt. P-M-fo the nsha t whishiisei ihi fim or' a e fi h'ith x n process. ii e h p'lishedin a relatively convenient and jeas a n- .ner i fhe q k he colla ",9flii 'i o sehed and t ad usti vkno .5 turn d nt :the .desired R-.P-1M,- i ained Th 'fq kmemberafifi. Delh threadedly engaged withthe adjusting screwBl, moves downwardly and upwardly, depending upon the direction in which the adjusting knob is rotated. Obviously, the lower thesliding col- "la-r isfin relation to -its contactpoint ;on the conical driving means 6-1, the-slower the REP-3M. of the mai-n shaft 11.

The changing "of *the ;-efiective length of -';sl iaft ---l 8' orthe substitution of another shaftis readily accomplished bymanipulation of the-means H5. The eollar 9 band the lockingcollar'fi are rotated :as a unit, while the-collar fifl'isn heldjfixeti, and the fiange is moved longitudinally of theshaft I in either direction to engage or disengage the chucklfi. 7

*Turning now to the second embodiment-pithy: invention, illustrated 5, for the purpcisdof avoiding needlessrepetition, certain of the parts are given thesame reference characters as those 7 m With the addition of the prefix l.

The device, generally indicated by ,reference "character Hit comprises broadly a relativelystat-ionary frame H I, -a relatively mova'ble frame H2, a prime'mover'l l3, speed changing and power transmission means I [4, a main shaft 1| [-1, "declutching means I20, a mixing element shafft H8, a mixing element I I9 and a support member ":225. "The declutchingmeans comprisesan eit- *ternally threaded barrel 206 having ag nllrl adjusting-knobZUB at one end thereof, Disposed W thin the ba e i is a h c ls rihe 1; b ing connected at both ends thereof'tothe end caps a lniline- Therelatively movable-frame I I2 comprises .a "top wall I61 having an upstanding portionf222 andis provided with an orifice-2'43, a ;front-wa'-ll [63, a rear edge ml and a-bottomPQrtion143. Ext' dme rearwardly from he o tom n rtien "I 43 is an ear I91, penetrated'bythe pin 128. A countersunk 'bore 199 hasbeen provided in'the bottom Portio 3,19 pa aeeoiith maihshaft VI 11 and an .0 ifi e'22 in the top wander-th gbearingi is vA boss ex e di g upwardlyircm th topsurface 1 40. of'th bottom p tion i was jabeari es etifl th rein torec ve thetlbwerend .of the ahih t h cr The relatively stationary irame 1, comprises e-iho t are 198 a rea wa a d? b i cDi pQ fid en .the toward he iigef the bottom flange I88 is an ear I96 and rearwardly projecting from the bottom flange I88 is an ear I83. An internally threaded orifice 2I5 is provided in the upper portion 230 of the rear wall ISO to receive the barrel 206. V

The support member 225 may be pivotally and adjustably connected to the ear I83 by a bolt and wing nut 250 and may be carried by any suitable adjustable stand (not shown) having a laterally extending arm 220. The main shaft II'I, having a central bore H5, is provided with externally reduced portions 2I6 and 2H at the ends thereof. The lower end of the shaft has external threads and is provided with a countersunk bore 2I8. Disposed longitudinally upon the axis of the main shaft are the keyways I55 which coact with keys (not shown) on the annular driven member I84.

The speed changing and power transmission means, generally indicated by reference character H4, comprises a conical driving member I61, the annular driven member I84 having an annular groove 220, a fork member I86 with arms 224.

The mixing element shaft holding means II6 may be identical with the form shown and described in the first embodiment of the invention.

Operation slipping of the member I84 when liquids of a high viscosity are being mixed.

To assemble the second embodiment of the invention, the movable frame with its members, and the stationary frame are each assembled separately and then joined by means of the pin I28 and the declutching means I20.

To assemble the movable frame II2, the adjusting screw is engaged with the fork member I86 and held in place by the set screw I83. The main shaft II'I may now be passed through the orifice223 in the top wall I6! engaging the an- .nular collar I84 and coming to its operating posi- 'tion when the enlarged portion of the shaft II'I .contacts the bearing Ml. The bearing I44 may :now be forced into position and the locking disc 3260 made secure to the movable frame II2 by means of the screws 252. The chuck means II6 and the collar I96 may be placed upon the shaft H1 at this time and the. mixing element shaft zII8, with the mixing element H9, can then be inserted into place.

The stationary frame I I I may be assembled by mounting the motor H3 on the bottom flange I88 and securing the driving member 161 to the motor shaft. The barrel 206 of the declutching means may now be screwed into place. At this time the stationary frame and movable frame may be joined by means of the pivot pin I28 and the spring 2H] inserted within the barrel 206 of the declutching means I26 and retained in place by the end caps 2I2 and H4. The spring 2I0 'is hooked on to the caps 2I2 and 2I4.

I wish it to be understood that I do not desire to be limited to the exact details of construction 8 shown anddescrib'ed, for obvious modifications will occur to aperson skilled in the art; 7

I claim: 1. A mixer comprising: a first frame; a second frame; said first and second frames being pivotally interconnected; a main shaft journaled in the second frame and having an impeller at one terminus thereof; a collar; said collar being reciprocably slideable along said shaft, and being keyed to said shaft; a collar engaging member; a screw threadedly engaged by said collar engaging member; said collar engaging member being reciprocably movable, along said screw by rotation of said screw; a cone rotatably mounted on the first frame and engaging said collar; and

declutching means; said declutching means acting to separate the cone from the collar; the axis of said cone and main shaft having a non-parallel relationship with respect to each other; said declutching means maintaining said cone and said collar in engagement by first resilient means, and having a second positive means for separating said cone and said collar against said first mentioned'resilient means.

2. A mixer comprising: a firstframe; a second frame; said first andsecond frames being rotatably interconnected; a main shaft journaled in the second frame, said main shaft having a keyway; said keyway being arranged axially in said shaft; a collar; said collar having a key and being reciprocably slideable along said shaft; a collar engaging member; a screw threadedly engaged by said collar engaging member; said collar engaging member being reciprocably movable along said screw by rotation of said screw; a cone rotatably mounted on said first frame and engaging'said collar; the axes of said'cone and said main shaft being disposed at an angle with respect to each other; and declutching means; said declutching means serving to rotate said first frame with respect to said second frame, whereby said cone is disengaged from said collar; said declutching means including a spring. for'maintaining said coneandsaid collar in resilient engagement, and a. shaft threadedly engaged upon said first frame and; bearing against said second frame, rotation of which serves to separate said collar and said cone against the resilient actio of said spring. g

3. A mixer comprising: a first frame; a second frame; said first and second frames being pivotally interconnected; a main shaft journaled inthe second frame and having an impeller at oneterminus thereof; a collar; said collar bein reciprocably slidable along said shaft, and being keyed to said shaft; a collar engaging member; a screw threadedly engaged by said collar engaging member; said collar engaging member being reciprocably movable along said screw by rotation of said screw; a cone rotatably mounted in a shaft bearing on the second frame and resiliently engaging said collar; said shaft bearing in turn being pivotally mounted for rotation rotation against the resilient action of said belt, whereby said cone may become disengaged from said collar.

ABRAM I. PODELL.

REFERENCES CITED The following references are of record in the file of this patent:

Number 10 UNITED STATES PATENTS Name Date Pryibil Aug. 1, 1876 Inness et a1; Dec. 23, 1902 McCarthy et a1 Sept. 8, 1903 Stevens Sept. 26, 1905 McNeel May 6, 1919 Dennis May 17, 1927 Olsen Dec. 29, 1931 Miller Sept. 11, 1934 

